Selecting system using a single magnet



Feb. 21, 1933.

A. A. CLO KEY SELECTING SYSTEM USING A SINGLE MAGNET Filed Oct. 31, 1931 INVENTOR F 3 ALLISON A. CLOKEY ATTORQEY Patented Feb. 21; 1933 UNITED I STATES PATENr OFFICE nnnrson a. enem or nu'rnmonn, nnw JERSEY, ASSIGNOB r mrnimanonn.

COIEUNICLTIOHS LABORATORIES; INC,

orrniwironx snnncrme swarm; name a smeLn nemir Application flldbctobet a1, 1931. Serial in. 512,363.

of selector elements is controlled from a remote point. It more especiall relates to magnetic distributors employe in the receivin units of printing telegraph systems whereln a plurality of mechanlcal operations is-selectively controlled from a remote point.

An object of the invention is to provide a simplified selecting mechanism forthe receiving units of printing telegraph systems.

A feature of the invention is the provision of a magnetic distributor having a winding and a shaft carrying a pole piece, at

least one of these elements being rotatable to control a'number of armatures of a magnetic system.

Another feature of the invention resides in the provision of a magnetic distributor having a winding and a shaft carryin a pole piece and wherein there are a plura ity of magnetic circuits available for controlling the .operation of a series of armatures one at a time and in succession.-

Other features and advantages will be apparent from the following description and ap nded claims.

or the purpose of illustrating the genus of the invention, a few embodiments thereof areshown in in which:

-Fig. 1 isa central sectional view of a magnetic distributor according to one embodiment of the invention; a

Figs. 2 and 3 are similar views of other embodiments of the invention; F1Fig.4 is an end view along line 4-4 of v Fig. 5 is a similar view along the line 5-5 of Flg. 2; and g Fig. 6 is a fralgmentary section taken along line 66 of ig. 2.

Referring to Figs. 2, 5 and 6 wherein'one 5 embodiment of the'invention is illustrated, numeral 11 designates a rotatable shaft which carries apole piece 12 and positions the same in front of several armatures 13, 14, 15, 16 and 17 of stationary magnet windin s 20, 21, 22, 23 and 24, respectivelyn ach armature engages a selector or latch the accompanying drawing.

pin 25 to operate the same, the movement of pins 25 being limited by a pair of stop collars 26 and 27 fixed to each pin and engageable-with a stationary part 28. The ar- Ol' NEWARK, NEW JERSEY, A CORPORATION matures are biased into unoperated position I .by a spring 30. Each latch pin 25 serves to hold a printer member or permutation .bar

31 in the unoperated position against the biasin effect of a spring 32.

Eac of the other armatures'carries a similar selector 25 and controls the operation of its individual member 31. The ,shaft' 11 rovides a, common magnetic return circuit or the stationary magnets. The core designated 33 affords a fulcrum for the armature associated with each magnet.

.If the windings 20 to 24 inclusive are energized at the time pole piece 12 comes opposite an armature, the latter will be -at-' tracted, pulling its selector to the left, as viewed in Fig. 2, and releasing member 31 associated therewith. The other armatures will be similarly attracted when the pole piece 12 is positioned opposite an energized winding, and the other selectors 25 actuated;

as before. The selectors 25 and members 31 are restored to latched position by means only that armature will be attracted that is' in front of a pole'piece 3, since the airgap for all other magnets is such as to reduce the pull below that required to operate the armature against the pull of the retractile springs 30.

With the windin s 20 to .24 inclusive connectedv in series an to the circuit of the incoming line section, considerable undesirable inductance would be added in the circuit. Thiscould be eliminated by having a contact ing device on shaft 11 which would shortcircuit all coils except the one whose armature is in front of the pole piece 12. Under this condition only asingle vinding would A be in circuit at any giventlme.

Another method of eliminating the undesirable inductance is shown in Fig. 2 in which the coils 20to 24 are energlzed individually through a rotating commutator disc 34. The

body of this disc is of insulating material and has an annular contacting ring 35 embedded in and flush with one face thereof. A vsegmental contact 36 integral with or electrically connected to the ring 35 is arranged flush with the opposite face of the disc. Disc 34 is mounted on shaft 11 so as to rotate there with and have segmental contact 36 facing nals will be distributed an caused to operate those armatures corresponding to the marking portions of the signal. Thus, members 31 may be selectively released to operate printing mechanism of a printing telegraph receiver. The shaft 11 may be driven by any s'uitable start-stop clutch mechanism in a manner well known in the art, or by any practicable electric or other motor Since the arrangement above described, wherein the windings are in series, is, in efiect, a single magnet providing five distinct magnetic circuits and but one winding may be placed in circuit at a time by either of the above described methods, it is evident that a similar result would be obtained by placing a single winding around the common magnetic return path. Such an arrangement is shown in Figs. 1 and 4 wherein a single winding 45 is disposed about a rotatable shaft 12. In this arrangement, as before, although but a single winding is used, there are five distinct magnetic circuits. However, only one of these magnetic circuits is effectively completed at a time, so the results accomplished are essentially those described in connection with Figs. 2,5 and 6. Like parts in Figs. 1

and 4, and 2, 5 and 6 have been given the same, numerals, and, as the operations of the two arrangements are practically the same, the operation of the second arrangement will be clear from the above description of the first embodiment.

Referring to Fig. 3, a third arrangement embodying the invention is disclosed. In this arrangement a shaft 51 carries a single winding 46 upon the eccentrically bent portion 47 thereof, so that the winding is brought successively into operating position in front of several armatures 53 upon rotation of the shaft. But one armature, indicative of a plurality of armatures, is illustrated in this figure, and it is pivoted at 48 to a standard 50 and is biased to unoperated position by a spring 30, except when winding 46 is positioned in front of that particular armature and is energized from a line section circuit 42.

The winding is energized through a commutator disc 54 comprising two rings 55 and 56 mo'unted in an insulating material, and each connected to one terminal of winding 46. Rings 55 and 56 engage two brushes 57 and 58 which are connected one to a line section circuit 42 and the other to ground, as indicated at 60. The armatures are successively operated to move selectors 25 and release a plurality of printer members 31, as in the other two embodiments previously described.

As many changes could be made in the above described arrangement, and many apparently widely difierent embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or showing shall be interpreted as illustra-' tive and not in the limiting sense.

What is claimed is: a

1. In a magnetic distributor, the combination of an electromagnet having a stationary winding and a movable pole piece, a plurality of armatures for said magnet and a shaft forming a portion of the magnetic circuit of said magnet'for rotating said pole piece into operative positions relative to said armatures for successively controlling their operation.

2. In a magnetic distributor, the combination of a magnet having a stationary winding adapted tobe energized in response to received signal impulses, a movable pole piece and a plurality of armatures for said magnet and a shaft forming a portion of the magnetic circuit of said magnet for rotat-. ing said pole piece into successive and operative posltions relative to said armatures to selectively control their operation in accordance with the energization of said winding.

3. In a magnetic distributor, the combination of an electromagnet havinga stationary winding, a plurality of armatures for said magnet, a pole piece rotatable with respect to said winding and a shaft forming a portion of the magnetic circuit of said magnet for rotating said pole piece in synchronism with received signals and positioning said pole piece to successively control the operation of said armatures in accordance with the energization of said winding.

4. In a magnetic distributor, the combination of a plurality of stationary windings adapted to be selectively energized in response to received signal impulses, an armature for each winding, a movable pole .piece and a shaft for rotating the same in mounted ortion adapted to be operatively positione relative to said armatures for successively controlling their operation in accordance with impulses received bv said electromagnet.

6. In a telegraph receiver, an electromagnet comprising a solenoid and a core therefor formed by a shaft adapted to rotate about its axis in s nchronism with received sig- .nals, a plum ity of armatures radially disposed around said shaft as a center, and a pole piece eccentrically mounted on said shaft, said, pole piece being adapted when rotated to successively control the operation of said armatures in accordance with received signals.

In witness whereof, I hereunto subscribe my name this 19th dav of October, 1931.

ALLISON A. CLOKEY. 20 

